#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2023, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

set -e -o pipefail

if [ $# -gt 0 ] && [ "$*" != '--yes' ]; then
    echo "Syntax: TARGET=[debian|redhat] $(basename "$0") [--yes]" >&2
    exit 1
fi

# Detect packaged gems and show a warning message
GEMS_LOCATION='/usr/share/one/gems'
if [ -d "$GEMS_LOCATION" ]; then
    cat << EOF >&2
WARNING: Running install_gems is not necessary anymore, as all the
required dependencies are already installed by your packaging
system into symlinked location $GEMS_LOCATION. Ruby gems
installed by this script won't be used until this symlink exists.
Remove the symlink before starting the OpenNebula services
to use Ruby gems installed by this script. E.g. execute

    # unlink $GEMS_LOCATION

Execution continues in 15 seconds ...
EOF

    sleep 15
    echo
fi

# detect target
if command -v dpkg >/dev/null; then
    TARGET=${TARGET:-debian}
elif command -v rpm >/dev/null; then
    TARGET=${TARGET:-redhat}
fi

# Install packages
case "${TARGET}" in
    'debian')
        echo "* Install Build Dependencies for ${TARGET}"

        export DEBIAN_FRONTEND=noninteractive

        apt-get update >/dev/null

        apt-get -y install \
            ruby-dev make gcc libsqlite3-dev libcurl4-openssl-dev \
            rake libxml2-dev libxslt1-dev patch g++ build-essential \
            libssl-dev libaugeas-dev pkgconf \
            postgresql-server-dev-all \
            >/dev/null

        # default-libmysqlclient-dev OR libmysqlclient-dev
        apt-get -y install default-libmysqlclient-dev >/dev/null 2>&1 || \
            apt-get -y install libmysqlclient-dev >/dev/null

        # workaround missing libxml2 headers on some Ubuntu/Debian
        ln -s /usr/include/libxml2/libxml /usr/include/libxml || :
        ;;
    'redhat')
        echo "* Install Build Dependencies for ${TARGET}"

        yum -y install ruby-devel make gcc sqlite-devel mysql-devel \
            openssl-devel curl-devel rubygem-rake libxml2-devel \
            libxslt-devel patch expat-devel gcc-c++ rpm-build augeas-devel \
            postgresql-devel rubygems \
            >/dev/null
        ;;
    *)
        echo "Unknown target ${TARGET}. Skipping build dependencies" >&2
        ;;
esac

# Install Bundler
if ! command -v bundler >/dev/null; then
    echo '* Install Bundler'

    for VERSION in '' '~>2' '<2'; do
        if [ -z "$VERSION" ]; then
            if gem install bundler >/dev/null 2>&1; then
                break
            fi
        else
            if gem install bundler --version "$VERSION" >/dev/null 2>&1; then
                break
            fi
        fi
    done

    if ! command -v bundler >/dev/null; then
        echo "ERROR: Failed to install Bundler" >&2
        exit 1
    fi
fi

# Find Gemfile location and pass to Bundler
echo '* Install Gem Dependencies'

for GEMFILE in \
    "${PWD}/Gemfile" \
    "${ONE_LOCATION}/share/Gemfile" \
    "/usr/share/one/Gemfile"
do
    if [ -f "${GEMFILE}" ]; then
        bundle install --system --gemfile="${GEMFILE}"

        echo 'Successfully done!'
        exit 0
    fi
done

# Fail if no Gemfile found
echo "ERROR: No Gemfile found" >&2
exit 1
